2
: an abnormal change in structure of an organ or part due to injury or disease
especially
: one that is circumscribed (see circumscribe sense 1) and well defined
Examples of lesion in a Sentence
Recent Examples on the Web
Since unveiling her diagnosis, the Emmy-winning actor has been open about her condition — from the 30 lesions on her brain to the difficulty and discomfort of attending all-day Hollywood events like the 2023 Emmy Awards, where her colleagues celebrated her with a standing ovation.
—
Alexandra Del Rosario, Los Angeles Times, 5 June 2024
The woman had two lesions related to a traumatic head injury that had healed.
—Julia Binswanger, Smithsonian Magazine, 29 May 2024
Bite marks in the center of the lesion Itching
Small, round lesions
Swelling
People can react significantly to mosquito bites, such as developing hives, low-grade fever, and swollen lymph nodes.
—Amanda Gardner, Health, 27 May 2024
Shield did not detect small lesions of less than 10 millimeters.
—Mary Kekatos, ABC News, 24 May 2024
See all Example Sentences for lesion 
Alexandra Del Rosario, Los Angeles Times, 5 June 2024
The woman had two lesions related to a traumatic head injury that had healed.
—Julia Binswanger, Smithsonian Magazine, 29 May 2024
Bite marks in the center of the lesion Itching
Small, round lesions
Swelling
People can react significantly to mosquito bites, such as developing hives, low-grade fever, and swollen lymph nodes.
—Amanda Gardner, Health, 27 May 2024
Shield did not detect small lesions of less than 10 millimeters.
—Mary Kekatos, ABC News, 24 May 2024
See all Example Sentences for lesion
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'lesion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near lesion
Cite this Entry
“Lesion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lesion. Accessed 8 Jun. 2024.
Copy CitationKids Definition
lesion
noun
le·sion
ˈlē-zhən 
: a change in the structure of a bodily organ or part due to injury or disease
especially
: an injured or diseased spot or area clearly marked off from healthy tissue around it
Medical Definition
Legal Definition
lesion
noun
le·sion
ˈlē-zhən
in the civil law of Louisiana
: loss from failure to receive a threshold amount or value (as one-half market value) for immovable property conveyed or transferred by a commutative contract (as a sale or exchange)
called also lesion beyond moiety
compare unjust enrichmentEtymology
Anglo-French, damage, injury, from Latin laesio, from laedere to injure
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